| Stannah Lift Services Limited | Manufacturing | 1974 |
| Stannah Lifts Holdings Limited | Real estate | 1961 |
| Stannah Lifts Limited | Manufacturing | 1974 |
| Stannah Management Services Limited | Administrative & support | 1990 |
| Stannah Microlifts Limited | Manufacturing | 1969 |
| Stannah Pension Trustees Limited | Extraterritorial | 2024 |
| Stannah Stairlifts Limited | Manufacturing | 1978 |
| Star Media Management Limited | Professional & scientific | 2014 |
| Starebi Ltd | Wholesale & retail | 2025 |
| Station Inn Andover Ltd | Hospitality | 2004 |
| Stax and Wings Ltd | Hospitality | 2026 |
| Stayplanna Ltd | Administrative & support | 2026 |
| Stead Head Limited | Professional & scientific | 2021 |
| Steampunk Furniture Limited | Construction | 2019 |
| Steerco Ltd | Information & communication | 2026 |
| Steinemann Analogue Graphic Limited | Manufacturing | 2022 |
| Stephen Kemble Bloodstock Ltd | Agriculture & fishing | 2000 |
| Stephen Smith Consulting Limited | Professional & scientific | 2022 |
| Stepping Stones Consulting Ltd | Professional & scientific | 2019 |
| Stepstrap Limited | Manufacturing | 2025 |
| Steve Rubery Limited | Professional & scientific | 2021 |
| Steven Hydraulics Ltd | Professional & scientific | 2019 |
| Steward Estates UK Limited | Real estate | 2016 |
| STF Properties Limited | Real estate | 2026 |
| Stheman Ltd | Professional & scientific | 2022 |
| STK Retail Ltd | Wholesale & retail | 2018 |
| Stone Vine & Sun Limited | Administrative & support | 2006 |
| Stoodley Building Contractors Ltd | Construction | 2016 |
| Storm Fencing and Landscaping Ltd | Construction | 2026 |
| Stout Build Limited | Construction | 2020 |
| Streamline Interiors Ltd | Construction | 2023 |
| Stretch Tent Supplies UK Ltd | Wholesale & retail | 2023 |
| Stride Beyond Silence CIC | Other services | 2026 |
| Stringbrokers Music Ltd | Wholesale & retail | 2011 |
| Strukta (Taunton) Ltd | Wholesale & retail | 2013 |
| Strukta Group Limited | Wholesale & retail | 2013 |
| Stud Farm ST Mary Bourne Andover (Management) Limited | Real estate | 2006 |
| Studilink Global Mobility Ltd | Administrative & support | 2026 |
| Studio 1314 Ltd | Professional & scientific | 2015 |
| Studio Bastion Ltd | Professional & scientific | 2021 |
| Suave Productions Limited | Administrative & support | 2016 |
| SUB Fire Suppression Ltd | Professional & scientific | 2024 |
| Success Photography Events Limited | Professional & scientific | 2015 |
| Success Photography Limited | Extraterritorial | 1997 |
| Sumitra and Devi Properties Ltd | Real estate | 2025 |
| Summit Accounting and Consulting Ltd. | Professional & scientific | 2011 |
| Summit International Limited | Professional & scientific | 2002 |
| Sun-Ra Services Limited | Transport & logistics | 2015 |
| Sunbird Investments Limited | Financial services | 2022 |
| Sundrop Services Limited | Real estate | 2005 |
| Sunnymead Financial Planning Ltd | Financial services | 2021 |
| Sunnyside Equity Release Ltd | Financial services | 2020 |
| Sunnyside Rentals Ltd | Real estate | 2022 |
| Supa Sweep Ltd. | Administrative & support | 2016 |
| Supercentre Cars Ltd | Wholesale & retail | 2025 |
| Superclean Car Wash Ludgershall Ltd | Administrative & support | 2025 |
| Superdrive Academy Limited | Education | 2024 |
| Supported Housing Experts Limited | Professional & scientific | 2024 |
| Supreme Design & Build Ltd | Construction | 2015 |
| Sups Property Ltd | Real estate | 2025 |
| Sureflow Group Ltd | Financial services | 2026 |
| Sureway Transport Limited | Transport & logistics | 2003 |
| Surrealvisions Limited | Wholesale & retail | 2025 |
| Sussex Game Group Limited | Agriculture & fishing | 1976 |
| Sussex Golf Consultants Limited | Arts & recreation | 1997 |
| SVG Electrical Solutions Ltd | Construction | 2021 |
| SVT Drive Ltd | Transport & logistics | 2026 |
| SW Safe Drivers Ltd | Information & communication | 2016 |
| Swansea Property Management Ltd | Real estate | 2014 |
| Swattons Limited | Real estate | 2017 |
| Sweet Basil Enterprise Ltd | Hospitality | 2013 |
| Sweetbriar Limited | Water & waste | 2004 |
| Swift Courier Solutions Ltd | Transport & logistics | 2012 |
| Swiftholme Management Company Limited | Households | 2020 |
| Swiftport Ltd | Wholesale & retail | 2025 |
| Swimming Pool Magazines Limited | Information & communication | 1997 |
| Swirling Blue Limited | Information & communication | 2011 |
| Swissmaid UK (Andover) Ltd | Administrative & support | 2007 |
| Swissmaid UK (Newbury) Limited | Administrative & support | 2009 |
| Swissmaid UK Limited | Administrative & support | 2001 |
| Swissmaid UK Services Ltd | Administrative & support | 2015 |
| Sycamore Court (Andover) Management Company Limited | Households | 2016 |
| Symbiotic Impact Ltd | Administrative & support | 2025 |
| Synergy International Inc Ltd | Professional & scientific | 2022 |
| Synergy Paints Limited | Extraterritorial | 2012 |
| SZ Aesthetics Ltd | Health & social care | 2024 |
| SZN Investments Ltd | Real estate | 2025 |
| T & T Discount Furniture Ltd | Wholesale & retail | 2019 |
| T Seymour Ltd | Agriculture & fishing | 2009 |
| T&H Signature Cleaning Co Ltd | Administrative & support | 2026 |
| T&T Delivery Services Ltd | Transport & logistics | 2016 |
| T.E.D Solutions Ltd | Professional & scientific | 2022 |
| T2 Southern Domestic Limited | Manufacturing | 2025 |
| T2 Southern Limited | Construction | 2017 |
| TAG Adventures Ltd | Wholesale & retail | 2021 |
| Talbot Walker (Administration) Limited | Extraterritorial | 2001 |
| Talbot Walker LLP | | 2005 |
| TALK21 Consulting Limited | Professional & scientific | 2017 |
| Talking Heads Andover Limited | Other services | 2014 |
| Talos Art Foundry Limited | Manufacturing | 2010 |